METHOD AND APPARATUS FOR TREATING WASTE INCLUDING CHLORINE-CONTAINING PLASTIC

Japanese Patent JP3495476

B2

PROBLEM TO BE SOLVED: To make it possible to efficiently remove chlorine content from waste by comminuting the waste, separating it into light-duty content and heavy-duty content according to specific gravity difference, and thermally decomposing the heavy-duty content at a specific temperature to be removed.
SOLUTION: Plastic mixture containing chlorine-containing plastic and waste containing an inorganic content are first comminuted to a suitable size. The comminuted waste is classified to light-duty content containing light-duty plastic as a main body and heavy-duty content containing heavy-duty plastic and metals as main bodies according to a specific gravity difference in gas or water. Since the separated heavy-duty content is concentrated at the chlorine-containing plastic such as PVC in the waste, it is supplied to thermally decomposing means, and thermally decomposed at 250 to 400°C. Thus, the chlorine content is separated as hydrochloride, and simultaneously slight thermally decomposed gas is generated. The generated hydrochloride, thermally decomposed gas and thermally decomposed residue of solid content are separated. The obtained residue is gasified or heat-treated.

Yoshiyuki Takeuchi
Naoyoshi Oda
Haruyoshi Fujita

JP26833395A

February 09, 2004

October 17, 1995

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MITSUBISHI HEAVY INDUSTRIES,LTD.

B29B17/00; B29B17/04; C08J11/12; B29K27/06; B29K105/26; (IPC1-7): C08J11/12; B29B17/00

JP5215320A
JP6126743A
JP691649A
JP5774513A

Ryoichi Hagiwara (1 person outside)

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